Portable fan



FIG. 1 is a front perspective view of a portable fan showing our design;

FIG. 2 is a rear perspective view of the portable fan shown in FIG. 1;

FIG. 3 is a right side perspective view of the portable fan shown in FIG. 1;

FIG. 4 is a left side perspective view of the portable fan shown in FIG. 1;

FIG. 5 is a top perspective view of the portable fan shown in FIG. 1; and,

FIG. 6 is a bottom perspective view of the portable fan shown in FIG. 1. 

The ornamental design for a portable fan, as shown. 